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Gastric constriction device

a gastric bypass and gastric tube technology, applied in the field of gastric bypass devices, can solve the problems of increasing the risk of leakage, reducing affecting the treatment of obesity, so as to reduce the volume potential of the stomach, prevent slippage, and reduce the effect of stomach volume potential

Active Publication Date: 2010-07-20
PROXY BIOMEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0050]a collapsing device at least partially insertable into the interior of a stomach to at least partially collapse the stomach from a normal volume to a reduced volume.
[0110]In one aspect the invention provides a method for treating obesity, the method comprising; surgically accessing the stomach; inserting a balloon into the stomach with a predetermined volume; reducing the size of said stomach; placing a gastric support device on said stomach; securing said gastric support device to said stomach having a reduced size / volume, wherein said gastric support device comprises a biocompatible material configured to constrain expansion of the stomach; surgically closing access to said stomach while leaving said gastric support device in place on said stomach.

Problems solved by technology

Obesity is a major public health challenge and financial burden for most industrialised countries.
Conservative treatment, such as dieting, exercise and lifestyle changes, typically fails, making surgery the only hope for these patients.
For example, their construction can result in characteristics that increase the risk of leakage, acute gastric dilatation, wound infection / seroma, obstruction, stoma narrowing / stenosis (with persistent vomiting), ulcer, band slippage or erosion, reservoir deflation / leak, anaemia, calcium deficiency / osteoporosis, and vitamin and mineral deficiencies.
Additional disadvantages include the presence of a foreign body, possible difficulties with reversibility if needed, and the increased operative time required to complete the more difficult procedures.
The procedures described above can also result in extended patient stay in the hospital due to the invasive nature of the procedures.
Also, there is a 19% risk of incisional hernia post-operatively when the procedure is performed by open surgical techniques.
The gastric harness implant will create weight loss for the patient over the predetermined time period.
In addition, the gastric pacing device creates a feeling of satiety in the patient.

Method used

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Examples

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Effect test

example 1

[0241]A nonwoven soft tissue implant was constructed using a biaxially oriented polymer film. Expanded PTFE film measuring 0.024 inches in thickness was obtained from Bard Vascular Systems (Tempe, Ariz., USA). Expanded PTFE was machined into the design Mesh2E cell patterns using a die punch produced by Elite Tool & Die (Smithstown, Ireland).

example 2

[0242]A nonwoven soft tissue implant was constructed using biaxially oriented polymer films. Expanded PTFE film, part number 1TM22250, was obtained from BHA Technologies (Slater, Mo., USA). Twelve sheets of the film were placed between two sheets of DuPont Kapton 200HN film (Circleville, Ohio, USA). The sheet assembly was brought to 350° C. at 400 PSI of constant pressure for 15 minutes under vacuum. The laminated assembly was machined into the design Mesh2E cell patterns using a die punch produced by Elite Tool & Die (Smithstown, Ireland).

example 3

[0243]A nonabsorbable gastric wrap was created using silicone tubing. A 100 cm length of tubing was perforated in 1 cm increments with a 2 mm punching tool. The gastric wrap was implanted into a canine at Charles River Laboratories (Ballina, Co. Mayo, Ireland). The assembly was used to wrap the stomach of a 22.8 kg canine. Interrupted Mersilk 1 sutures (Ethicon, Somerville, N.J., USA) were used to secure the gastric wrap in position against the stomach. In addition, a Maxon 1 monofilament absorbable suture (United States Surgical, Norwalk, Conn., USA) was used to support the wrap by running the suture through the wrap perforations along the longitudinal axis of the stomach. The canine was fed an unrestricted high calorie diet and sacrificed at 30 days. The weight of the animal at sacrifice was 21.6 kg. The gastric wrap had incorporated into the stomach wall with a moderate degree of adhesion formation and inflammation present.

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Abstract

A gastric constriction device (160) comprises a sheet (131) extending over part of the wall of the stomach (24). Five bands (151) extend around the stomach (24) to fix the sheet (131) in position relative to the stomach (24). The lower two bands (151) extend from the first side (152) of the sheet (131) around the stomach (24) only partially towards the second side (153). These lower two bands (151) are not fixed to the second side (153). This arrangement results in an unconstricted portion of the stomach (161). In this manner, the device (160) restricts expansion of the majority of the stomach wall while facilitating expansion of this unconstricted portion (161). The unconstricted portion (161) is therefore free to expand or bulge outwardly upon ingestion. This expansion may trigger the feeling of satiation due to the presence of the vagal nerves in this portion (161) of the stomach (24).

Description

[0001]This application claims the benefit of U.S. Provisional Application No. 60 / 514,212, filed Oct. 23, 2003, the content of which is hereby incorporated by reference.INTRODUCTION[0002]This invention relates generally to a gastric constriction device, and more specifically to gastric implants that can be used to treat obese patients. In particular the invention relates to mechanical systems for treating morbid obesity, especially to devices that interface mechanically with a patient's digestive system in order to restrict food intake.BACKGROUND[0003]Obesity is a major public health challenge and financial burden for most industrialised countries. In the United States, the healthcare costs for treating obesity reached more than $238 billion in 1999. The Centers for Disease Control and Prevention estimates that nearly 40 million American adults (about 20% of the adult population) are obese. The prevalence of obesity in the United States increased from 12% in 1991 to 19.8% in 2000. Th...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): A61F2/00A61F5/00
CPCA61F5/0003A61F5/0026A61F5/0086A61F5/0063
Inventor GINGRAS, PETER
Owner PROXY BIOMEDICAL
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